Upgrade to AWS SDK v2

[artembilan]

• Upgrade to Spring Integration AWS 3.0.1
• Upgrade to Spring Cloud AWS 3.0.1
• Use spring-cloud-aws-dependencies BOM to manage Spring Cloud AWS deps, as well as AWS SDK
• Remove AmazonS3Properties in favor of similar properties in the Spring Cloud AWS auto-configuration
• Remove CompatibleStorageAmazonS3Configuration in favor of its code migration to the single AmazonS3Configuration
• Fix supplier, consumer, source and sink for S3 to use API and programing model from the mentioned upgrades
• Add extra dataflow-configuration-metadata entries for the mentioned properties from the Spring Cloud AWS auto-configuration
• Regenerate README for s3-source and s3-sink
• Fix metadata-store-common to use the latest Spring Integration AWS for DynamoDB store impl

[artembilan]

This might easy justify an RC2 - too many breaking changes.

I wish I didn't forget to do this a month ago when I released Spring Integration AWS 3.0 😢

[artembilan]

And the question.

There is a module like stream-applications-integration-tests. Do we use it any where? Do we really need to update its integration tests to our latest changes? Looks like that one rely on latest Docker images which I'm not sure when we make available. Perhaps already after release...

Thanks